Essays about: "refractive index"

Showing result 21 - 25 of 50 essays containing the words refractive index.

  1. 21. Characterizing optical and electrical properties of monolayer MoS2 by backside absorbing layer microscopy

    University essay from Uppsala universitet/Institutionen för fysik och astronomi

    Author : Nathan Ullberg; [2020]
    Keywords : backside absorbing layer microscopy; BALM; monolayer MoS2; TMD; TMDC; 2D materials; nanomaterials; nanotechnology; refractive index; extinction coefficient; absorption coefficient; field-effect transistor; FET; semiconductors; optoelectronics; optics; raw image processing; chemical vapor deposition; CVD; in situ characterization;

    Abstract : Nanomaterials are playing an increasing role in novel technologies, and it is important to develop optical methods to characterize them in situ.  To that end, backside absorbing layer microscopy (BALM) has emerged as a powerful tool, being capable to resolve sub-nanometer height profiles, with video-rate acquisition speeds and a suitable geometry to couple live experiments. READ MORE

  3. 22. Simulation of Lüneburg Lens Constructed With Glide Symmetric Periodic Structures

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Joar Forsberg; Olle Blomqvist; [2020]
    Keywords : Metasurface; glide symmetry; lens; Lüneburglens; unit cell;

    Abstract : The goal of this project was to design a lens utilisinga glide symmetric periodic structure. A Lüneburg lens forantennas with a center frequency of 8 GHz has been designed.The structure was constructed using a unit cell in the shape ofan angular Bowen knot. This unit cell was then etched on themetallic surface of a parallel plate waveguide. READ MORE

  4. 23. The influence of molecular structure of phospholipids on the transition from micelles to bilayers in bile salt surfactant/phospholipid mixtures

    University essay from Uppsala universitet/Institutionen för läkemedelskemi

    Author : Zeyneb Alkademi; [2020]
    Keywords : phospholipids; micelles; bilayers; bile salt; surfactant;

    Abstract : Phospholipid molecules self-assemble to form bilayers that are poorly soluble in an aqueous solvent. Phospholipids may, however, be readily dissolved by mixing with a bile salt or amphiphilic drug surfactant that forms mixed surfactant/phospholipid micelles. READ MORE

  5. 24. Distributed Temperature Sensing Using Phase-Sensitive Optical Time Domain Reflectometry

    University essay from KTH/Tillämpad fysik

    Author : Simon Ek; [2020]
    Keywords : Applied physics; Distributed optical fiber sensing; Rayleigh scattering; OTDR; phase-OTDR; Temperature; Refractive index; Strain; Correlation; RISE; Single mode fiber; SMF; Tillämpad fysik; Distribuerad optisk fibermätning; Rayleigh-spridning; OTDR; phase-OTDR; Temperatur; Brytningsindex; Töjning; RISE; Korrelation; Singelmodfiber; SMF;

    Abstract : This thesis explores and evaluates the temperature measuring capabilities of a phase-sensitive optical time-domain reflectometer (φ-OTDR), which exploits Rayleigh backscattering in normal single mode optical fibers. The device is constructed and its setup explained, and a protocol for making temperature measurements with it is developed. READ MORE

  6. 25. The Development of a New High Aspect-Ratio Turbulent Channel Flow Facility

    University essay from KTH/Strömningsmekanik och Teknisk Akustik

    Author : Agastya Parikh; [2020]
    Keywords : ;

    Abstract : Turbulent channel flows are of great interest for investigations of modified wall boundary conditions due to their well-understood characteristics and their broad applicability. In a reversal of typical trends, they can often be more difficult to investigate experimentally than to simulate owing to the far-reaching influence of corner effects as well as the need for development lengths in excess of 200 channel half-heights in order to produce high-quality flow. READ MORE